Improvement in locks for doors



N0. 166,620, Patented Aug.10,1875;

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NO. 166,620. Patented Aug.10,l875.

Flo nl. Flug N FIC VII FIG IX UNITED STATES PATENT OFFICE,

JAMEs G. L. MARTIN, 0E EUFAULA, ALABAMA.'

IMPROVEMENT IN LOCKS FOR DOORS.

Specification forming part of Letters Patent No. l 66,620, dated August10, 1875; application led December 17, 1874.

To all whom it may concern:

Beit known that I, JAMES G. L. MARTIN, of Eufaula, in the county ofBarbour and State of Alabama, have invented certain new and usefulImprovements in Combined Bar- Locks for Doors; and I do hereby declarethat the following is a full, clear, and exact description thereof,which will enable others skilled in the art to which it pertains to makeand use the same, reference being had to the accompanying drawings, andto the letters of reference marked thereon, which form a part of thisspecification.

The design of this invention is to combine a lock with a pivoted bar fordoors of dwellings, banks, warehouses, barns, corn cribs, ginhouses, andsmoke-houses, and to fasten and unfa-sten the door-bar by means of a keyfrom the outside of the door.

The bar-lock consists of a pivoted fasteningbar applied to the innerside of a door, and made to enter keepers on the door-jamb, and lockedand unlocked therewith, from the outside of the door, by means of ahook-shaped extension of the bar entering a lock-case and engaging witha pivoted tumbler or elbowlever, which is disengaged for freeing the barby means of a camcarried by a revolving pulley or disk, that is irstunlocked from a xed spindle, a-nd then turned on the same by a keyinserted from the outside of the door, and entered into the face of thepulley. rlhe pulley is grooved, and carries a chain, which is connectedwith a spring catch-plate on the end of the fastening-bar, so as torelease said catch from the keeper, and then, by turning the pulley bythe key, the chain is wound on the pulley, so as to turn the bar on itspivot until it is disengaged from the keepers, which enables the door tobe opened, the unwinding of the chain and the lowering and fastening ofthe bar being also effected by the key and the weight of the bar.

The special features ot' invention which I have made will bespecifically pointed out in the claims.

In the accompanying drawings, Figure 1 represents al1 elevation of acombined barlock embracing my invention, and showing the door-barfastened and the lock-casing removed; Fig. 2, a similar elevation,showing the door-bar unfastened; Fig. 3, a vertical cross-section at theline m a; of Fig. 1, showing the pulley locked with its fixed spindle orarbor; Fig. 4, asimilar view, showing the pulley unlocked from the fixedspindle or arbor; Fig. 5, a view in perspective of the pulley un: lockedfrom its spindle; and Fig. 6, a similar view, showing the pulley lockedwith the spindle.

The door A may be that of a dwelling or warehouse, bank-vault, or otherplace of deposit. B designates the casing or frame into which the dooris set. To the inner side of the door is attached, by means of apivot-bolt, a, a transverse horizontal fastening-bar, C, the ends ofwhich are caused to enter bracketshaped keepers D E, securely fastenedto the door-casing. The keeper D is formed with a closed outer wall, b,on the inner side of which is made a shoulder or offset, c, for thereception of a locking or spring catch-plate, cl, applied to the end ofthe fastening-bar. The catch-plate yields sufficiently to permit thefastening-bar to pass within the shoulder, and it springs into place tohold the bar in a locked position. The pivot pin or bolt of thefastening-bar is generally located at a short distance from the centerof the same, so as to cause a preponderance of weight to be at one endof the bar, the result of which is that receive the horizontal arm of alocking-tumbler or elbow-lever, H, pivoted within the lockcase G. Thistumbler is pivoted to the front plate of the lock-case, and theremainder of the lock mechanism occupies the inside space of the caseand the back plate. The bar-locking tumbler H is arranged in front of orin proper relation to a pulley or disk, I, fitted on a stationaryspindle or arbor, J, the front end of which terminates at the frontkey-hole plate,

and the rear end of which passes through the back plate of thelock-case, and is screwed into a nutplate, f, located thereat, and heldfrom turning by a square hole in a plate, f. The pulley or disk iscircumferentially grooved, and it carries a chain, K, which is attachedto the catch-plate d on the end of the fasteningbar. The spindle orarbor J is made cylindrical nearly its entire length,so as to enable thepulley to readily turn on the same, and it is provided with a square,oval, or angular portion or boss, L, in front of the pulley I, whichprojection is designed to enter a corresponding recess in a vkeyreceiving and holding plate M on the front face ofthe pulley. Wvhen theparts are in this position the pulley is held stationary or flxed on itsarbor, as the square projection and recess will preclude the turning ofthe same. The pulley is constantly pressed forward, so as to cause it toengage with the square projection on the arbor, through the medium of aspring N, interposed between the rear face of the pulleyr and the backplate of the lock-case. The spring is, in the present instance, made ina curved or plate form; but any other suitable spring may be employedfor accomplishing the same result. Iteversely-running seats or recessesO, Fig. 7 in the back plate of the lock-case, eceive the ends of theplatespring N, to allow the same to move to a proper extent. A conv'explate or block, P, having a grooved rear face is fitted on the centralor bow portion of the spring, which serves to hold it in contact with acorrespondingly-convexed plate, Q, fitted into and securely fastened ona circular seat or recess, R, formed in the rear :face of the pulley ordisk. The two convex surfaces, placed in contact with each other, tendto produce a sort of globe-bearing', which will enable the pulley toturn freely. The key spindle or arbor passes through the pulley, conveXbearings, and spring, and thus serves to hold the designated parts inproper relation to eacl other. The key S, employed in connection with mybar-lock, is provided With a long tubular barrel, m, and with abifurcated inner end or branches, n, havin g projections or points 0.The plate M on the front face of the pulley is provided with openings p,corresponding with the points 0, and it will thus be perceived that byintroducing the key from the outside of the door, so as to engage withthe plate M, the pulley can be moved longitudinally on its arbor, forunlocking it, by pressing' the key in an inward direction, and then itca'n be rotated by turning the key, which receives the angularprojection L be tween its prongs n. The door-bar is unlocked through themedium of a cam-shaped block, T, on the pulley, which, when the same isturned, will come in contact with the vertical arm of the tumbler orelbow-lever H, and turn the same on its pivot, for releasing it from thelocking-arm F of the hook F. The rotary movement of the pulley will alsowind up the chain, thus releasing the fastening-catch on thelocking-bar, and drawing the same from its keepers.

In connection with a lock and key of the construction specified, Ipropose to use two or more key-hole plates, U V, located, respect ively,on the outer and inner sides of the door, and provided with key-openings, crossing each other, or arranged at right angles to each other, atsuch distance as to allow the key-fork to turn freely in the key-hole.In order to introduce the key into the pulley it will be necessary toalternately push and turn the key until it strikes the pulley. I alsoprovide means for operating the locking-bar from the inner side of thedoor, and this I accomplish by attaching a rod or wire, YV, to thevertical arm of the tumbler or elbow-lever H, and running it through thebottom of the lockcase, where it terminates in a button or loop. Thetumbler is also connected by a wire, X, with the free end of aplatespring, Y, Figs. l and 2, attached to the front plate of thelockcase. By pulling on the wire WV the tumbler is released from thelocking-bar, and the same can then be moved by hand. The spring Y holdsthe tumbler in proper position for operation with the hook-arm of thelockingbar.

I claiml. The combination, with the pivoted locking-bar C, provided withthe hookF IT', ofthe lever H and the cam-pulley 1 T, connected with saidbar C by the chain K, whereby the bar C is both unlocked and turned bythe direct action of said pulley, as set forth.

2. In combination with the fastening-bar O and grooved pulley I, theconnecting-chain K and the spring catch-plate d on the end of thefastening-bar C, substantially as and for. the purpose herein set forth.

3. The combination of the pulley I, having a rotating and slidingmovement upon its spindle, with the angular boss L on the arbor J, thespring N, and the angular socket in the pulley I, whereby the pulley isreleased from the locking-boss and rotated to raise the bar, as hereinset forth.

4. The convex bearingplates P Q, in combination with the revolvingpulley I, the spring N, and the lock-case G, substantially as and forthe purpose specied.

5. The lock-case G, provided with reverselyrunning seats or recesses O,in combination with the pressure-spring N and pulley l, substantially'asand for the purpose herein described.

In testimony that I claim the foregoing as my own I have afxed mysignature in presence of two witnesses.

JAMES G. L. MARTIN. Witnesses:

J. C. MCKENZIE, D. R. WILSON.

